It is a very interesting and important subject to enhance the man- computer communication capbilities and build up a user-friendly user- computer interface. From the viewpoint of computer architecture, this paper discusses the concepts of user-computer interface, its position and roles in the computer architecture. It also discusses the models of user-computer interface and the methodology of the design of user- computer interface systems and interactive user-computer ( graphic ) dialogue programs. On the basis of the achievements of others, the paper puts forward the concepts and method of consistent selecting techniques and its contributions to the consistency of the user-computer interface. Furthermore we studied the support to the full exploitation of humane creativity by an excellent user-computer interface. We also study the methods of interactive computer graphics on large-sized page ( larger than the terminal space or the output area of a hard copy device ). At the mean time we are implementing an interactive man-computer interface system ( called IMCIS ).
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